Nitrates for achalasia.
D004931:Esophageal Achalasia / Q000188:drug therapy*; D006801:Humans; D020030:Nitric Oxide Donors / Q000627:therapeutic use*; D009574:Nitro Compounds / Q000627:therapeutic use*; D016032:Randomized Controlled Trials as Topic
D020030:Nitric Oxide Donors; D009574:Nitro Compounds